ERBB2 and invasive ductal breast carcinoma: Pathological testing confirmed the following four breast cancer markers: ER-positive (BC01 and BC02; luminal A), ER/HER2-positive (BC03; luminal B), HER2-positive (BC04, BC05, and BC06; HER2), and triple-negative (BC07-BC11; TNBC) invasive ductal carcinoma.